Bobbin



Patented Mar. 27, 1934 UNITED STATESv PATENT OliliiCl'.

3 Claims.

bobbin having a spindle-clutching device for holding the bobbin firmly in fixed position during 5 the winding and/or spinning operation, which device may either form an integral part of the bobbin or be readily assembled therewith, and which is of simple construction, economical to manufacture and efficient and reliable in operation.

Further objects relate to the construction of my improved bobbin and will be apparent from a consideration of the following description and accompanying drawing which shows different embodiments of the invention chosen for the purpose of illustration.

In the drawing:

Fig. 1 is a longitudinal sectional View of a bobbin constructed in accordance with the present '20 invention and Shown in operative position on a spindle of the type generally used in spinning operations;

Fig. 2 is a fragmentary side elevation of the bobbin;

Fig. 3 is a bottom plan view thereof;

Fig. 4 is a fragmentary side elevation, partly in section, of a bobbin embodying a modified construction;

Fig. 5 is a bottom plan View of the bobbin shown in Fig. 4; and

Fig. 6 is an elevation of the spindle-engaging bushing.

The bobbin shown in Figs. 1 to 3 comprises an elongate cylindrical member having the usual body portion 1, terminating at one end in an enlarged butt portion 2 and having an axial bore 3 which extends the entire length of the bobbin. The butt portion is provided with a plurality of spaced, longitudinally extending, radially dis posed, peripheral slits 5 which extend through the entire thickness of the butt and body portions and define a plurality of depending, radially iiexible, segments 6. A reinforcing ring or ferrule 7 is circumposed about the body portion l adjacent to the ends of the slits 5 to strengthen the body portion and prevent any danger of splitting.

The outer periphery of the butt portion is provided with circumferentially extending grooves T155, the number that may be used. The springs 9 8 which receive annular spring members here normally exert a uniformly distributed contrac-` tive force on each of the segments and yieldingly oppose outward radial movement thereof.

When the bobbin is placed over the blade of a spindle 10, as shown in Fig. 1, the butt portion seats upon the upper end of the whirl 11 which is provided with a flat shoulder portion, here shown as an annular collar 12 having a press iit about the whirl and conical neck 13. lf desired, the spindle may be made with a fiat shoulder portion integral with the whirl, thus dispensing with the use of the collar 12. The diameter of the upper part of the neck 13 is approximately the same as that of the bore of the bobbin and at the lower end its diameter is appreciably greater so that when the bobbin is seated on the shoulder l2 the segments 6 are iiexed outwardly against the action of the springs 9 and consequently firmly grip the periphery of the neck and thereby hold the bobbin in position.

It will be noted that the collar 12 not only provides a rm seat for the bobbin, but furthermore, cooperates with the clutching segments 6 to hold the bobbin in a definite xed position relative to the whirl and range of travel of the yarn guiding devices, thus overcoming the necessity of making readjustments of such devices before winding each bobbin as is usually required with the prior constructions wherein the bobbin is forced over the spindle so that the butt portion wedges about the neck and does not assume any definite or xed position relative to the whirl or yarn guiding devices. Moreover, with the present construction there is no danger of the bobbin losing its grip on the spindle during the winding operation, or vibrating out of proper position, and consequently the winding operation may be carried out more accurately and at a greater speed than heretofore possible.

In the embodiment shown in Figs. 1 to 6 the butt portion 2 is provided with an enlarged axial bore in which a bushing 15 is concentrically disposed, the bushing being retained therein by a pressed fit against the inner periphery of the bobbin, as shown in Fig. 4. The bushing is prefof depending, radially flexible, resilient segments or fingers 16 having outwardly flaring ends 17 which are spaced inwardly from the end of the I.- erably of metal and is provided with a plurality i butt portion of the bobbin to provide a slight 105 clearance so that the bobbin may be `seated on the spindle without interfering with the iiexing movement of the segments. The bushing 15 and butt portion define an annular recess 18 which provides suiiicient clearance between the seg- :7,110

ments and the inner Walls of the butt portion to permit an unrestrained flexing movement of the segments. An annular spring 2G, circumposed about the segments 16, seats upon the projecting end portions 17 as shown in Fig. 4 and yieldingly opposes outward radial movement of the segments as in the previously described embodiment.

Although the spring 2O is herein shown as an annular coil spring, it is to be understood that other means may be provided for yieldingly restraining the outward movement of the segments suoli for example as a resilient split ring. If desired, the bushing 15 may be of any material capable of providing spindle-engaging segments possessing more or less resiliency and suicient stiffness yieldingly to oppose outward iexing movement so that the bobbin may he firmly held in place Without the use of the spring 20 or its equivalent.

While I have shown and described different einbodiments of the invention, it is to be understood that the present disclosure is for the purpose of illustration only and that various czianges in shape, proportion, and arrangement of parts, as Well as the substitution of equivalent ele ents for those herein shown and described may he made Without departing from the spirit and scope of the invention as set forth in the appended claims.

I claim:

1. A bobin comprising a tubular member having an enlarged axial bore one end, and clutching means at said end for frictionally engaging a spindle, said means comprising a tubular bushing disposedwithin said bore and defining an annular recess, said bushing being secured at one end to the bobbin and having a plurality or" de pending radially exible ngers coaxial with said bore and spaced from the inner periphery of the boblcin, and an annular spring disposed in said recess and engaging the free ends or" said fingers yieldingly to oppose outward radial movement thereof.

2. A bobon comprising a tubular member having an enlarged axial bore in one end, and clutching means at said end for rictionaliy engaging a spindle, said means comprising a tubular bushing concentrically disposed within said bore and deiining an annular recess, said bushing being secured at its upper end Within the bore and having a plurality of depending radially flexible segments spaced from the inner periphery of the poppin and provided with outwardly extending end portions, and an annular spring seated upon the end portions of said segments Within said recess for yieidingly opposing out Jard radial movement of said segments.

3. 1n a spinning machine, the combination with a rotary spindle having a blade and a Whirl mounted on the blade, the whirl having a neck concentric with the blade and a nat shoulder por- 166 tic-n surrounding the neck, of a bobon comprising elongate cylindrical member having a butt portion seated on said shoulder portion, said butt portion having an enlarged axial bore, and clutching means secured to said butt portion for frictionally engaging a spindle, said means comprising a tubularV bushing secured at one end within said bore and having a plurality of radially flexible segments eircuniferentially disposed Within said bore in spaced relation to the inner periphery of said butt portion.

GEORGE H. MAGRATH.

iso 

